God forbears judgment on account of Christ's propitiation through His Atonement. His forbearance isn't forgiveness of our sins, but simply covering them in order to allow us to repent and be forgiven. This forbearance will be lifted at Judgment, and those sins we haven't repented of will be uncovered and judged. I see it as similar to a plea in abeyance. When you commit a crime, and you go before the judge, you are given instructions on what you need to do, and if you fulfill the requirements, the charge is dropped from your record as if it never happened. The judge forebears judgment to give you a chance to make it right, and have the wrong blotted out. Our "plea in abeyance" as God's children requires us to repent of our sins and follow His Son's perfect example.
